Home > Products > Protocol Software > X.25

X.25 Software for CCITT/ITU Standards

Overview

APS-X.25 is a streams based software package that supports the X.25 data communications protocol on UNIX operating systems. As a member of the Adax Protocol Software (APS) product line it supports the principles of flexibility, high performance, and open standards conformance that define Adax’s commitment to its customers. Together with the APC line of communications controllers, APS-X.25 provides a high performance, highly integrated X.25 communications solution for billing applications or wireless network infrastructure.

Performance is in the Details

The APS-X.25 software package can be used with any of the Adax HDC or ACT Protocol Controllers. APS-X.25 supports up to 3,000 logical channels that may be multiplexed over any number of 1 to 256 separate physical connections. APS-X.25 supports X.25 CCITT/ITU X.25 standards from 1976, 1980, 1984, or 1988 as well as BX.25. APS-X.25 can be used singularly or in conjunction with other Adax or 3rd party products in a number of different applications.

APS-X.25 Utilities

 APS-X.25 provides a set of user utilities that emulate equivalent TCP/IP applications over an X.25 network.

These applications include:

• xmail: An application similar to the Unix ‘mail’ program which allows users to send electronic mail to remote users over a X.25 network.
• xft: An application similar to the Unix ‘ftp’ program which allows users to send files to a remote machine over a X.25 network.
• xcu/xpad: An application similar to Unix ‘cu’ and ‘telnet’ which allows users to log into remote machines connected over a X.25 network.
• Xlogin: An application similar to Unix ‘login’ which authenticates incoming calls from remote machines over a X.25 network.

APS-X.25 Configuration

Configuration of all X.25 and LAPB addresses, timers, and parameters are made through a single configuration file. Individual physical connections can have their parameters changed while the APS-X.25 software is running without disrupting any other connection.

Application Programmers Interface

C language library is provided to allow application programmers to easily access all of the features in APS-X.25. There are functions for making and receiving SVC calls, initializing and tearing down PVCs, sending and receiving regular X.25 packets as well as Q and M bit packets, and various statistical, control and diagnostic functions. C language source code is also provided for a sample listener daemon, the X.25 equivalent of the IP listener daemon ‘inetd’. This is used to receive incoming X.25 SVC calls and route them to an appropriate X.25 application. Programmers can easily modify and use this source code to provide incoming SVC call support for their applications.

Network Control, Diagnostics, and Statistics

x25reconfig is a utility which allows the user to modify physical link and logical connection information contained in the configuration file, while the X.25 software is running. Physical links can be modified individually without disrupting traffic on any other physical link. x25monitor is an application which can be used to monitor and gather status and statistical information on individual physical links or logical connections. It can also be used to enable or disable packet tracing on a granular basis so that individual X.25 packets can be examined. ‘x25monitor’ can also be used to enable accounting and logging of incoming and outgoing calls. All of the functions supported by ‘x25monitor’ are also available to application programmers through the Application Programmers Interface.

Optional Modules for IP and OSI

Adax SNDCF (Sub-Network Dependant Convergence Function) is a separate software product used in conjunction with APS-X.25 to provide an X.25 gateway between the user’s LAN and the X.25 network. With SNDCF and APS-X.25, IP traffic is encapsulated into X.25 packets for transmission over the X.25 network. Users can also utilize TCP/IP applications directly to hosts on the other side of a X.25 network, which behave as if the host was directly attached to the LAN. Adax TP0 is a separate software product used in conjunction with APS-X. 25 to utilize 3rd party applications based on the OSI application model, such as FTAM, RFS, X.400, or OSI VT.

Integration Expertise

Adax adds a key ingredient no other company can match – expert technical services. Combined with Adax’s fully integrated software and hardware products, our technical expertise helps you build the highest performance foundations for your network. You can count on Adax to be there with you no matter what changes may occur in operating systems, bus architectures, applications, or protocols.

Operating System Support and Adax Protocol Controllers

All Adax products are available for PCI, cPCI and PMC architectures, supporting Linux and Solaris Operating Systems. VxWorks, HP-UX and IBM AIX are also supported for certain products. The X.25 software operates with the following Adax products: HDC High Density Channelized Controller for Multiple Protocols ACT Channelized Controller for HDLC, LAPB/D and Frame Relay

Adax Software

Adax Protocol Software (APS) is a suite of products designed to get the most out of each Adax hardware product and is supplied with a set of common APIs enabling simple integration of the upper layers. Adax HDLC, SS7, SCTP, X.25, Frame Relay, LAPB, LAPD and LAPV5 provide a well-balanced, high performance, low overhead direct connection to the network.

Fastest Time to Market

Adax provides extremely fast time to market through simplicity of design and a modular product range. This common software interface ensures a simple migration path and provides a flexible and portable solution. The API’s between products remain the same preserving the investment in the higher layer software and applications. This compatibility enables quick upgrades to next generation requirements and easy field upgrades to expand the capabilities of installed systems.